Product information: Color: black, blue, gray, red Transmission range: 10 meters Applicable occasions for gifts: opening ceremony, employee benefits, anniversary celebration, awards commemoration, trade fair, advertising promotion, festival, wedding, housewarming, public relations planning, birthday, business gifts Function: call function, support music, led/card/FM/can be used as wired headset Wearing method: Head-mounted Function use: wireless headset, voice headset Bluetooth version: V5.0 Bluetooth mode supported: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5 Frequency: 2.402-2.480GHZ, 2.4g ISM band RF performance: receiving sensitivity: -84dBm; Transmitting power ≤ 4dBm Frequency response: 20Hz-20 KHz Signal-to-noise ratio (SNR):70Db; Total harmonic distortion rate (THD)0.1% Power Indicator: Blue Light Headset charging: Rechargeable 400mAh lithium battery Charging port: Mini 5-pin USB charging interface Normal charging time: about 3 hours Call duration: up to 10 hours Music duration: up to 6-8 hours Standby duration: up to 250 hours Operating temperature:-20oC-55oC Packing list: Headphone*1 USB charging cable*1 Audio cable*1 Manual*1 Product Image: